         new-seen (roll/see-config (:seen-configs world) config)]
     (assoc world :configs new-configs
                  :seen-configs new-seen
-                 ;:explored #{}
+                 :explored #{}
                  :now (:entry-time config))))
 
 (defn reset-world [w]

                   3 {:type :white :x 160 :y 8 :w 8 :h 16}}
   :objects       {:ga {:type  :goomba
                        :state :right
                        :x     8 :y 8}
                   :gb {:type  :goomba
                        :state :right
                        :x     32 :y 8}
                   :gc {:type  :goomba
                        :state :right
                        :x     12 :y 35}
                   :gd {:type  :goomba
                        :state :right
                        :x     64 :y 8}
                   :ge {:type  :goomba
                        :state :right
                        :x     96 :y 32}
                   :m  {:type  :mario
                        :state :idle-right
                        :x     200 :y 8}}})

(set! heval/frame-length (/ 1 30))
(set! heval/time-units-per-frame 10000)

  {:width         320
   :height        240
   :camera-width  320
   :camera-height 240
   :scroll-x      0
   :scroll-y      0
   :walls         {0 {:type :white :x 0 :y 0 :w 256 :h 8}
